package thread;

public class ThreadDemo {
    public static void main(String[] args) {
        Thread t1 = new MyThread1();
        Thread t2 = new MyThread2();
        t2.start();
        t1.start();

    }
}
class MyThread1 extends Thread {
    public void run() {
        for (int i = 0; i < 1000; i++) {
            System.out.println("开门");
        }
    }
}

    class MyThread2 extends Thread {
        public void run() {
            for (int i = 0; i < 1000; i++) {
                System.out.println("查水表的");
            }
        }
    }

